Up-cut shear



F. A. BEATTY I May 7, 1935.

UP-CUT SHEAR Filed Jan. 21, 1931 3 Sheets-Sheet 1 INVENTOR LIN May 7,1935. F, A. BEATTY 2,000,314

UP-CUT SHEAR I Filed Jan. 21, 1931 5 Sheets-Sheet 2 Patented May 7, 1935p i i UNITED STATES FATE or rice My invention relates toan up-cut shear;More particularly my invention relates to; an improved arrangement in'up-cut shears operable to take care of; different sizes of blooms and tochange adjustment of the shears rapidly and accurately.

One object of my invention is to provide an up-cut shear having an.adjustable upper shear which may be rapidly and accurately adjusted. Afurther object of my invention is to provide a yielding abutment whichpresses against the material being cut so as to push downwardly on thematerial during the return stroke of the lower shear.

In the drawings in which there is shown, not as limiting my inventionbut for the purpose of illustrating the same,one embodiment which thesame may assume,

Fig. 1 is a central vertical section through the up-cut shear; V r.

, Fig. 2 is a vertical section on line II- -II of Fig. 1;

Fig. 3 is a horizontal section through the shear above the lowercutting-element;

Fig. 4 is a detail view in central vertical section showing thecounter-weight for the upper shear support.

In the shearing machine shown in the drawings there are provided twooppwed shear supports 5 and 6, the support 5 carrying the upper cuttingelement 1 and the support 6 carrying the lower cutting element 8. Duringa cutting operation, the upper support 5 remains stationary and thelower support 6 is reciprocated. Accordingly, the material which isbeing cut is lifted by the support 6. There is a tendency, due to theplastic character of the material at the time of shearing, for the endof the material which is lifted by the support 6 to become distorted andpushed out of line. I have provided yielding means for engaging the endof the material which is raised by the support 6; and accordingly, thismeans yields during the upward movement of the support 6 and pressesdownwardly on the end of the material during the return movement of thesupport 6. This compensates for the tendency of the movement of thesupport 6 to distort the material being out.

In the particular embodiment shown, a support 9 projects laterally fromthe shear support 5, being secured thereto by bolts or the like. Aplurality of bolts l0 extend slidably through the support 9, beingvertically disposed. A plate or other abutment I3 is carried by thelower ends of the bolts l0; and springs ll surround the bolts it) so asto resiliently urge the abutment l3 down- .The weight I"! morethanbalances the shear wardly. Nuts |;2- on the upper'ends of the bolts 10adjust the compression of the springs fH." It

isapparent, therefore that when the support 6 forcesthe'end of thematerial being cut to 'elevated position, the abutment I3 is engaged and"5 lifted so as to compress the springs H. As the support 6 is againlowered, the springs ll elongate -and press the material downwardly tourge the same into its original straight'condition.

, The upper shear support 5'is'slidable between the inner faces of thefour support members-l5. The ends of the-support 5 engage wear plates onthe inner faces of closure members l6 bolted in placefoverthe openingsat the ends of thesupport 5. The weight oftheshearsupport 5 is, as shownin Fig. 4, counter-balanced by a weight I! carried by a lever [8. Theleveril8' is pivoted at l9 to a support on the upper cross head 20, andis connected by links 21 to the upper shear support 5.

20 support 5: sof'that the 'latterlwould be rapidly moved upwardly wereit not positioned by means or screws or the like: carried by the uppercross head 26. Sockets-23am providedon the top of the shear support 5 toreceive the lower rounded ends of vertical positioning screws 24. Thescrews 24 threadedly engage inserts 25in the upper cross head 20 andareadapted to be simultaneously rotated so as to simultaneously elevate ordepress the two ends of the upper shear support 5. A motor 21 issupported on a bracket 28 extending laterally from the upper cross head20. Suitable driving connections are provided between the motor 21 andthe vertical screws 24. In the embodiment illustrated, the pinion on themotor 21 drives a gear 29 mounted on a worm shaft 30. Each screw 24 hassplined thereon a worm wheel 3|. Each worm wheel is held againstlongitudinal movement by a casing 32 carried by the upper cross head 26.Worms (not shown) on the worm shaft engage the worm wheels 3| tosimultaneously rotate the same when the motor 21 is driven. Bycontrolling the motor 21, therefore, it is possible to rotate thepositioning screws simultaneously in the same direction; and the shearsupport 5 is lowered if the motor is driven in one direction and raisedif the motor is driven in the opposite direction. During a shearingoperation, the inserts 25 take up the upward thrust of the shear support5. During shifting of the shear support 5 by the screws 24, the lever l8swings about its pivot 19 to permit the desired adjustment. Suchadjustment may accordingly be rapidly accomplished to bring the cuttingelement 1 closely adjacent the top of the material which is to be cut.Accordingly, when a different size bloom is to be cut, the shear support5 may be rapidly moved by driving the motor 21 in the proper direction;and the cutting elements 1 will be adjusted closely adjacent the top ofthe new size of bloom.

The lower shear support 6 is pivotally mounted on an eccentric 40. Abushing 4| see Fig. 1) is held by interlocking projections to thearcuate bearing surface-of the support 6*. The axis of this bearingsurface is the axis of a pin 42 which extends through the eccentric 40and through downwardly projecting arms 43 on the two sides of thesupport 6. These arms 43 are vertically slidable in grooves 44 providedin the main frame of the shear. As the eccentric is moved infits orbit,the shear support 6 is reciprocated vertically, being held to astraight, line pathv by the grooves 44. The eccentric 40 is pivoted tothe support 6 by the pin 42, the bushing 4| permitting sliding movementat the surface of contact between the shear support ,6 and the eccentric40. The pin 42 is obviously limited to up and down movement and the restof the eccentric must have an orbital movement.

'The eccentric 40 is mounted on the eccentric portion 45 of the shaft46. This shaft is driven through a suitable gear train, a portion ofwhich is shown in Fig. 3. This gear train comprises a gear 41 on theshaft 46, a-pinion 48 on a jack shaft49 and a ear couple 50, 5|. Thegear 5|) is secured to the shaft 49 and the gear 5| is driven by a powershaft 52.v It is apparent,

therefore, that the lower shear support 6 is vertically reciprocated byrotation of the power shaft 52. v

As has been above pointed out, the upper shear support may be rapidlyandaccurately adjusted by proper operation of the motor 21.. .Theprovision of the yielding abutment 3 hasthe ad: vantage that thematerial being cut is not left in a distorted conditiom My improvedactuating means for the lower shear support 6 has the advantage thatthere is a large bearing surface at 4| so that the powerful upwardthrust of the eccentric 40 may be applied through the shear support 6 tocut the material. At the same time, the straight line vertical movementof the shear support 6 is ensured by the cooperation of the lateral arms43 and the grooves 44.

While I have illustrated and described one specific form of shearingapparatus, it will be understood that the invention is not restricted tothe particular construction and arrangement shown, but may be variouslymodified within the contemplation of the invention and under the scopeof the following claims.

I claim:

,1. In a shearing apparatus having upper and 'lower cutting elements forcutting metal articles into lengths, an upper shear support, a lowershear support and means for reciprocating said lower shear supportcomprising a shaft rotatably supported beneath said lower shear supporthaving an eccentric portion, an eccentric mounted on said eccentricportion, the upper portion of said eccentric being formed with anarcuate bearing surface, and, said lower shear support beingformed witha cavity fitting over said arcuate' bearing surface toprovide a pivotalconnection,, and guiding means cooperating with said lower shear supportto produce straight line movement of the same.

2. In shearing apparatus, the combination of an upper shear. a lowershear movable vertically relative to the'upper shear to sever material,material supporting means for positioning a length of the material forsevering into sections, the lower shear being engageable with thematerial so as to displace the end of the corresponding section relativeto the remainder of said section and deformthe section during theshearing operation, means for actuating said lower shear, and opposedstraightening means engageable with said displaced end for pushingdownwardly thereon and reshaping the section as the lower shear islowered.

FLOYD A. BEAT'I'Y.

